The 4t80 shoehorn

[Prospeeder]

Guy on a-body.net put in a 4T80 behind his 400 horse Turbo 3.8 in his 84 Buick Century, had to modify it alittle, but he had a big thread about it over there if you looked around, he might have a few tips on it

[TurboGTU]

First disassemble the caddy axles. Take the shaft to your machinist buddy and have him move the snap ring grooves as close to the center as the splines will allow. About 3/8 inch. Do this to both ends, all four snap ring grooves. Then cut off that much from the ends. This shortens the axles 3/4 inch. Next disassemble the outer joints, removing the balls and cage, save the center portion the part that fits the axle. Next disassemble Fiero manual transmission axle outer joints. Auto axles will not work, they are too small. Save the outer part with the axle stub that goes through the bearings and drives the wheels. Now put the part you saved from the Deville outer in the Fiero outer, using the balls and cage from the Fiero outer. Now you have an outer joint that fits your Fiero and fits on the Deville shaft. Now reassemble complete shaft. You should end up with a shaft that is 3/4 inch shorter with caddy tripod on inside and fiero c/v on the outside.

Think i might try this...maybe I missed something using the tgp outer joints.


Prospeeder is that pontiacjeff?

[TurboGTU]

Nope didn't miss something. Took them both apart and the Aurora outer cv guts are smaller than the TGP outer guts. Tried using the Aurora part that has the lock on it into the sphere and balls and outer shaft from the TGP, didn't work. Going to look at Caddilac outer cvs and look at other cars CVs to see which works on the tgp outer.

[Prospeeder]

ahh you know what, sorry but i looked back, he used a 4T65E

[TurboGTU]

Intake arrived yesterday.  Just what I needed. Uses a larger throttle body much like the 3500. Its a drive by wire setup, but I will be using a ford TB or fab up the Ls1 throttle to work.

Before......



After........

[TGed]

Why is that manifold reversed?

[TurboGTU]

On the Equinox its intake is on the passenger side. So it had to clear where the PS pump would be. Of course  I didn't see a PS pump on Equinoxs I've seen. And my setup will need to face the intake the same way.

I went to the junk yard agan and messed with some Caddy axles. No dice. Next step is to use 97+ Grand prix strut and knuckle assymbly.

[TurboGTU]

Trying to put this in the front burner, It's been sitting to dam long. Only things holding back the swap is the CV axles. Other then that time and a cent or two. Going to talk to a CV axle shop about frankengoating these. Pulling the LG5 out of the Beretta and working on some head work. Going to the local yard to see if a PMIII is still there(some ass munch removed the lid let rain in) and remove some parts from it. 

[Shifter23]

Keep us posted!

[TurboGTU]

1990 Seville cv axle outer looks like it might work. The axles I was looking at the J-yard were of the N*/4t80e variety. Never though of these. Will looking into thise.